package com.admin.controller;

import com.admin.config.redis.RedisService;
import com.admin.entity.Permission;
import com.admin.entity.User;
import com.admin.entity.UserInfo;
import com.admin.utils.JwtUtils;
import com.admin.utils.MenuTree;
import com.admin.utils.Result;
import com.admin.vo.RouterVo;
import com.admin.vo.TokenVo;
import io.jsonwebtoken.Jwts;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.web.authentication.logout.SecurityContextLogoutHandler;
import org.springframework.util.ObjectUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.List;
import java.util.Objects;
import java.util.stream.Collectors;

/*
编写刷新token方法
* */
@RestController
@RequestMapping("/api/sysUser")
public class SysUserController {
    @Resource
    private RedisService redisService;
    @Resource
    private JwtUtils jwtUtils;
    /**
     * 刷新token
     *
     * @param request
     * @return
     */
    @PostMapping("/refreshToken")
    public Result refreshToken(HttpServletRequest request) {
        //从header中获取前端提交的token
        String token = request.getHeader("token");
        //如果header中没有token，则从参数中获取
        if (ObjectUtils.isEmpty(token)) {
            token = request.getParameter("token");
        }
        //从Spring Security上下文获取用户信息
        Authentication authentication =
                SecurityContextHolder.getContext().getAuthentication();
        //获取身份信息
        UserDetails details = (UserDetails) authentication.getPrincipal();
        //重新生成token
        String reToken = "";
        //验证原来的token是否合法
        if (jwtUtils.validateToken(token, details)) {
        //生成新的token
            reToken = jwtUtils.refreshToken(token);
        }
        //获取本次token的到期时间，交给前端做判断
        long expireTime = Jwts.parser().setSigningKey(jwtUtils.getSecret())
                .parseClaimsJws(reToken.replace("jwt_", ""))
                .getBody().getExpiration().getTime();
        //清除原来的token信息
        String oldTokenKey = "token_" + token;
        redisService.del(oldTokenKey);
        //存储新的token
        String newTokenKey = "token_" + reToken;
        redisService.set(newTokenKey, reToken, jwtUtils.getExpiration() / 1000);
        //创建TokenVo对象
        TokenVo tokenVo = new TokenVo(expireTime, reToken);
        //返回数据
        return Result.ok(tokenVo).message("token刷新成功");
    }
    /*
    * 查询用户信息
    * */
    @GetMapping("/getInfo")
    public Result getInfo(){
        //获取上下文信息
        Authentication authentication =
                SecurityContextHolder.getContext().getAuthentication();
        //判断身份信息authentication是否为空
        if(authentication == null){
            return Result.error().message("获取用户信息失败");
        }
        //获取用户信息
        User user = (User) authentication.getPrincipal();
        //获取该用户拥有的角色权限信息
        List<Permission> permissionList = user.getPermissionList();
        //获取角色权限编码
        Object[] roles = permissionList.stream().filter(Objects::nonNull)
                .map(Permission::getCode)
                .toArray();
        //创建用户信息
        UserInfo userInfo = new UserInfo(user.getId(),user.getNickName(),user.getPhotoId(),null,roles);

        return Result.ok(userInfo).message("用户信息查询成功");
    }
    /*
    * 获取菜单数据
    * */
    @GetMapping("/getMenuList")
    public Result getMenuList(){
        //从Spring Security上下文获取用户信息
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        //获取用户信息
        User user = (User) authentication.getPrincipal();
        //获取相应的权限
        List<Permission> permissionList = user.getPermissionList();
        //筛选目录和菜单
        List<Permission> collect = permissionList.stream()
                .filter(item -> item != null && item.getType() !=2)     //排除按钮
                .collect(Collectors.toList());
        //生成路由数据
        List<RouterVo> routerVoList = MenuTree.makeRouter(collect, 0L);
        //返回数据
        return Result.ok(routerVoList).message("菜单数据获取成功");
    }

    /*
    * 用户退出登录
    * */
    @PostMapping("/logout")
    public Result logout(HttpServletRequest request, HttpServletResponse response){
        /*获取token信息*/
        String token = request.getHeader("token");
        //如果头部中没有携带token，则从参数值中获取
        if (ObjectUtils.isEmpty(token)){
        //从参数中获取token信息
            token = request.getParameter("token");
        }
        //从Spring Security上下文对象中获取用户信息
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        //判断用户信息是否为空,不为空需要清空用户信息
        if(authentication != null){
            //清除上下文用户信息
            new SecurityContextLogoutHandler().logout(request,response,authentication);
            //清除Redis缓存中的token
            redisService.del("token_"+token);
        }
        return Result.ok().message("用户退出成功");
    }
}